Use views::style for buttons, bootstrap ash_typography to do so.

chrome/browser/ui/views/profiles/new_avatar_button.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/profiles/new_avatar_button.h"
 
 #include <utility>
 
 #include "build/build_config.h"
 #include "chrome/app/vector_icons/vector_icons.h"
@@ skipping 56 matching lines @@
       ui::EF_LEFT_MOUSE_BUTTON | ui::EF_RIGHT_MOUSE_BUTTON);
   set_animate_on_state_change(false);
   SetEnabledTextColors(SK_ColorWHITE);
   SetTextSubpixelRenderingEnabled(false);
   SetHorizontalAlignment(gfx::ALIGN_CENTER);
 
   // The largest text height that fits in the button. If the font list height
   // is larger than this, it will be shrunk to match it.
   // TODO(noms): Calculate this constant algorithmically from the button's size.
   const int kDisplayFontHeight = 16;
-  SetFontList(
+  label()->SetFontList(
       label()->font_list().DeriveWithHeightUpperBound(kDisplayFontHeight));

[tapted, 2017/04/07 07:49:52]

This `DeriveWithHeightUpperBound` method is horrible...

[Peter Kasting, 2017/04/08 01:38:54]

Long-term, anywhere that uses this should really probably be placing the text
inside an object that can auto-expand vertically.

[tapted, 2017/04/10 12:27:33]

Acknowledged.

 
   ui::ResourceBundle* rb = &ui::ResourceBundle::GetSharedInstance();
   if (button_style == AvatarButtonStyle::THEMED) {
     const int kNormalImageSet[] = IMAGE_GRID(IDR_AVATAR_THEMED_BUTTON_NORMAL);
     const int kHotImageSet[] = IMAGE_GRID(IDR_AVATAR_THEMED_BUTTON_HOVER);
     const int kPushedImageSet[] = IMAGE_GRID(IDR_AVATAR_THEMED_BUTTON_PRESSED);
 
     SetBorder(CreateBorder(kNormalImageSet, kHotImageSet, kPushedImageSet));
     generic_avatar_ =
         *rb->GetImageNamed(IDR_AVATAR_THEMED_BUTTON_AVATAR).ToImageSkia();
@@ skipping 119 matching lines @@
   }
 
   // If we are not using the generic button, then reset the spacing between
   // the text and the possible authentication error icon.
   const int kDefaultImageTextSpacing = 5;
   SetImageLabelSpacing(use_generic_button ? 0 : kDefaultImageTextSpacing);
 
   PreferredSizeChanged();
   delegate_->ButtonPreferredSizeChanged();
 }